The design of an outdoor swimming pool involves several key elements including structural design, water treatment systems, safety features, and landscaping. Structural design must consider the pool's shape, materials, and construction methods. Water treatment systems are crucial for maintaining water quality and safety. Safety features may include emergency exits, lifeguard stations, and clear signage. Landscaping should complement the pool and provide a harmonious environment. Additionally, factors like climate, location, and accessibility should be taken into account.